CN203351534U - Novel selective small-sized circuit breaker device - Google Patents
Novel selective small-sized circuit breaker device Download PDFInfo
- Publication number
- CN203351534U CN203351534U CN 201320268257 CN201320268257U CN203351534U CN 203351534 U CN203351534 U CN 203351534U CN 201320268257 CN201320268257 CN 201320268257 CN 201320268257 U CN201320268257 U CN 201320268257U CN 203351534 U CN203351534 U CN 203351534U
- Authority
- CN
- China
- Prior art keywords
- circuit breaker
- main contact
- contact
- operating mechanism
- short
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Breakers (AREA)
Abstract
The utility model discloses a novel selective small-sized circuit breaker device which mainly consists of a major loop and an auxiliary loop. A main contact, a reset spring, an impact electromagnet, and a thermal protection bimetallic strip are arranged on the major loop; an auxiliary contact, a short-time delay bimetallic strip, a current-limiting resistor and an operating mechanism are arranged on the auxiliary loop; the operating mechanism is connected with the main contact and the auxiliary contact, and controls connection and disconnection of the main contact and of the auxiliary contact; and the main contact is closed by operation of the operating mechanism, and is driven by the impact electromagnet to realize disconnection under a circumstance of a short circuit fault. The novel selective small-sized circuit breaker device adopts quick are interlocking, utilizes a communication function of an intelligent tripping device, when a lower-level circuit breaker QF2 detects a short circuit fault, a logic waiting signal is sent out to the upper-level novel circuit breaker QF1, realizing locking and disability before the lower-level fault is eliminated, thereby realizing multilevel selective protection from a power supply outgoing line end to a load side.
Description
Technical field
The utility model relates to field of circuit breakers, is specifically related to a kind of new selective miniature circuit breaker device.
Background technology
For a long time; the selective protection of low-voltage distribution system is generally used for the power distribution system of inducer for line outlet end of transformer; in recent years due to the raising of industrial production and people's lives; industrial control system and household electricity equipment duplexure increase; thereby come on load-side and terminal distribution selectivity raising schedule, studying a kind of corresponding selectivity circuit breaker for load and end side becomes a kind of inevitable.
The utility model content
The purpose of this utility model just is to provide a kind of more economic selectivity coupling, saves the set-up time, without a kind of new selective miniature circuit breaker device with short delay protection function of too high selection compliant fuser.
A kind of new selective miniature circuit breaker device mainly is comprised of major loop and two loops of subsidiary loop, is placed with main contact, back-moving spring, impact electromagnet, heat protection bimetal leaf on described major loop, described subsidiary loop is placed with auxiliary contact, short time delay bimetal leaf, current-limiting resistance, operating mechanism, described operating mechanism is connected with auxiliary contact with main contact, control main contact and auxiliary contact deciliter, described main contact is closed by the operating mechanism operation, under short trouble, by impacting electromagnet, promotes to realize disjunction, when short circuit current passes through, impact electromagnet and hit main contact, make it to disconnect, electric current is just transferred to subsidiary loop, but subsidiary loop is equipped with current-limiting resistance, short circuit current is limit to the hundreds of ampere, the short time delay bimetal leaf provides the short time delay effect, when after the disjunction of one-level miniature circuit breaker current limliting, back-moving spring makes main contact again closed, make it not affect other duplexure power supplies of next stage, if the little circuit breaker akinesia of rear one-level, after the time delay of short time delay bimetal leaf, make the circuit breaker operation mechanism action, open main contact and auxiliary contact simultaneously, under normal circumstances, operating mechanism operate simultaneously main contact and auxiliary contact deciliter, during due to normal operation, subsidiary loop resistance is large, electric current mainly carrys out conducting by major loop, when short trouble, only has the short circuit short time-delay characteristic, thereby be equivalent to instantaneous release is turn-offed, full selectivity during with the coordinating of the little circuit breaker of rear one-level, due to current-limiting resistance being installed on subsidiary loop, when being short-circuited fault, in breaking course, limit to short circuit current, improved the electronic and thermal stability of circuit breaker to short circuit current.
The utility model has adopted the fast area interlocking, utilize the communication function of intelligent electrical apparatus release, when the circuit breaker Q F2 of subordinate detects short trouble, send a logic waits signal to the new circuit breaker Q F1 of upper level, make its locking and akinesia before subordinate's Failure elimination; Realized the multi-level selective protection from the power outlet end to load-side.
The utility model has been realized the multi-level selective protection from the power outlet end to load-side, has more economic selectivity, saves set-up time and short delay protection function.
The accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present utility model;
Accompanying drawing 2 is the utility model regional interlock fundamental diagrams.
Embodiment
A kind of new selective miniature circuit breaker device mainly is comprised of major loop (1) and (2) two loops of subsidiary loop, is placed with main contact (3), back-moving spring (6), impact electromagnet (5), heat protection bimetal leaf (4) on described major loop (1), described subsidiary loop (2) is placed with auxiliary contact (7), short time delay bimetal leaf (9), current-limiting resistance (10), operating mechanism (8), described operating mechanism (8) is connected with auxiliary contact (7) with main contact (3), control main contact (3) and auxiliary contact (7) deciliter, described main contact (3) is closed by operating mechanism (8) operation, under short trouble, by impacting electromagnet (5), promotes to realize disjunction, when short circuit current passes through, impact electromagnet (5) and hit main contact (3), make it to disconnect, electric current is just transferred to subsidiary loop (2), but subsidiary loop (2) is equipped with current-limiting resistance (10), short circuit current is limit to the hundreds of ampere, short time delay bimetal leaf (9) provides the short time delay effect, when after the disjunction of one-level miniature circuit breaker current limliting, back-moving spring (6) makes main contact (3) again closed, make it not affect other duplexure power supplies of next stage, if the little circuit breaker akinesia of rear one-level, after short time delay bimetal leaf (9) time delay, make circuit breaker operation mechanism (8) action, open main contact (3) and auxiliary contact (7) simultaneously, under normal circumstances, operating mechanism (8) operate simultaneously main contact (3) and auxiliary contact (7) deciliter, during due to normal operation, subsidiary loop (2) resistance is large, electric current mainly carrys out conducting by major loop (1), when short trouble, only has the short circuit short time-delay characteristic, thereby be equivalent to instantaneous release (11) is turn-offed, full selectivity during with the coordinating of the little circuit breaker of rear one-level, due to current-limiting resistance (10) being installed on subsidiary loop (2), when being short-circuited fault, in breaking course, limit to short circuit current, improved the electronic and thermal stability of circuit breaker to short circuit current.
The utility model has adopted the fast area interlocking, utilize the communication function of intelligent electrical apparatus release (11), when the circuit breaker Q F2 of subordinate detects short trouble, send a logic waits signal to the new circuit breaker Q F1 of upper level, make its locking and akinesia before subordinate's Failure elimination; Realized the multi-level selective protection from the power outlet end to load-side.
The utility model has been realized the multi-level selective protection from the power outlet end to load-side, has more economic selectivity, saves set-up time and short delay protection function.
Claims (3)
1. a new selective miniature circuit breaker device mainly is comprised of major loop (1) and (2) two loops of subsidiary loop, it is characterized in that: be placed with main contact (3), back-moving spring (6), impact electromagnet (5), heat protection bimetal leaf (4) on described major loop (1); Described subsidiary loop (2) is placed with auxiliary contact (7), short time delay bimetal leaf (9), current-limiting resistance (10), operating mechanism (8); Described operating mechanism (8) is connected with auxiliary contact (7) with main contact (3), control main contact (3) and auxiliary contact (7) deciliter.
2. a kind of new selective miniature circuit breaker device according to claim 1 is characterized in that: described main contact (3) is closed by operating mechanism (8) operation, under short trouble, by impacting electromagnet (5), promotes to realize disjunction; When short circuit current passes through, impact electromagnet (5) and hit main contact (3), make it to disconnect, electric current is just transferred to subsidiary loop (2); Subsidiary loop (2) is equipped with current-limiting resistance (10), short circuit current is limit to the hundreds of ampere, short time delay bimetal leaf (9) provides the short time delay effect, when after the disjunction of one-level miniature circuit breaker current limliting, back-moving spring (6) makes main contact (3) again closed.
3. a kind of new selective miniature circuit breaker device according to claim 1, it is characterized in that: after short time delay bimetal leaf (9) time delay, make circuit breaker operation mechanism (8) action, open main contact (3) and auxiliary contact (7) simultaneously, under normal circumstances, operating mechanism (8) operate simultaneously main contact (3) and auxiliary contact (7) deciliter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320268257 CN203351534U (en) | 2013-05-16 | 2013-05-16 | Novel selective small-sized circuit breaker device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320268257 CN203351534U (en) | 2013-05-16 | 2013-05-16 | Novel selective small-sized circuit breaker device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203351534U true CN203351534U (en) | 2013-12-18 |
Family
ID=49751401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320268257 Expired - Fee Related CN203351534U (en) | 2013-05-16 | 2013-05-16 | Novel selective small-sized circuit breaker device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203351534U (en) |
-
2013
- 2013-05-16 CN CN 201320268257 patent/CN203351534U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104701111A (en) | Miniature circuit breaker capable of quickly breaking | |
| CN204348664U (en) | A kind of air switch | |
| CN201360082Y (en) | Power failure automatic protective socket | |
| CN102347177A (en) | Method for operating thermomagnetic circuit breaker | |
| CN205122517U (en) | Low -voltage circuit breaker | |
| CN100546142C (en) | A kind of shunted exciter tripping type single-phase short circuit protecting equipment | |
| CN107785217A (en) | A kind of Intelligent electronic optical pole breaker of plastic casing | |
| CN203562356U (en) | Single-pole double-throw change-over switch | |
| CN201466675U (en) | Leakage detection protection circuit | |
| CN203351534U (en) | Novel selective small-sized circuit breaker device | |
| CN203760330U (en) | Breaker closing circuit | |
| CN104953537A (en) | Overload protection switching device | |
| TW201724152A (en) | Intelligent non-fuse switch having has the effect of active protection and greatly simplifying the difficulty of maintenance | |
| CN201927560U (en) | Circuit breaker with selective protection function | |
| CN202864606U (en) | Elevator electric system safety return circuit | |
| CN215870722U (en) | Protective circuit and circuit breaker of switching device | |
| CN102074930A (en) | Electric leakage detection protective circuit | |
| CN201717670U (en) | Dual-power-supply switching device with overvoltage protection | |
| CN114284087A (en) | Low-voltage circuit breaking device and protection method for ubiquitous power Internet of things | |
| CN204464219U (en) | Miniature circuit breaker | |
| CN1996696A (en) | Control circuit for intelligent breaker loop protection | |
| CN203607351U (en) | A low-voltage circuit breaker automatic closing apparatus | |
| CN202333748U (en) | Three-phase four-wire null line breakdown protection device | |
| CN104900456A (en) | Moulded case circuit breaker and tripping mechanism thereof | |
| CN108400572A (en) | Zero-power overcurrent protection cut-off relay |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131218 Termination date: 20140516 |